Finally, we are taking a break from programming!
For the first week of playing with Arduino nano, we are making a switch that can turn on and off without being touched by fingers. After watching the tutorial videos and having a basic understanding of how circuits work, I decided to use water as the electric conductive medium to function as the switch.
To make the water switch, I poached the two sides of a zip bag using two wires, and tape them down to prevent water leakage.
Then, I poured water into the zip bag, zipped the bag, and turned it upside down so that the two wires are not connected by the water.
When I want to connect the circuit and light the blue LED light up, I simply lift the bag and let the water flow to the bottom of the bag to connect the two wires.
You can see the LED light is turned on despite the light is sort of dim. I’m guessing that’s because the conductivity of water is not as good as the wires or the switch itself.
References:
Video tutorials on Arduino nano and circuits:
https://www.youtube.com/watch?v=JQi9b-xtLKs&list=PLnkvii1uWBvEG_Vdgf9PDtCaDZCem3eoG&index=4
